Zelda snorted a little; she'd forgotten she tried to make him eat it live.
"I did try...after that. But live frog was a delicacy in some parts of the kingdom, you know."
...At least, that's what one of her ladies in waiting had told her. Now that she stopped to think about it, she might be willing to admit it was a joke that sailed over her head.
Add that to the list of things she was thankful to Link for - giving her space to not always be serious and thus miss silly little jokes like that.